Fix jq3 deprecations
What does this MR do?
it removes several deprecated jquery methods from all over the code. This should calm down the jquerymigrate plugin a bit.
How confident are you it won't break things if deployed?
hmmmmm actually quite, but those are many files touched...
Links to related issues
- added a test, or explain why one is not needed/possible... (should be mostly covered and visual testing done)
- no unrelated changes
- asked someone for a code review
- joined #foodsharing-beta channel at https://slackin.yunity.org
- added an entry to CHANGELOG.md (description, merge request link, username(s)) (not needed. Possibly this refactoring is not yet over.)